While most closed-cell spray foams will be above 6.0 per inch, open-cell is much lower at 3.6 to 3.8 per inch range. Open-cell will expand as soon as its applied, making it the perfect foam for ...

Measuring open-cell content is a crucial aspect when it comes to selecting a suitable foam. This article describes using the BetterPyc 380, an ASTM D6226-compliant gas pycnometer, to obtain accurate ...